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Exfoliation

Lactic Acid

Exfoliation / PoresMoisturizingBrightening
INCI: Lactic Acid
In short · TL;DR
Category
Exfoliation
Effect
An AHA that combines exfoliation with hydration. Tends to be milder than glycolic acid
Concentration
Japan's Standards for Cosmetics set no upper limit. The US safety assessment (CIR) considers consumer products safe at 10% or less with a product pH of 3.5 or higher.
Effect
An AHA that combines exfoliation with hydration. Tends to be milder than glycolic acid
Mechanism
Promotes shedding of the stratum corneum while also contributing to water retention as an NMF component
Typical concentration
Japan's Standards for Cosmetics set no upper limit. The US safety assessment (CIR) considers consumer products safe at 10% or less with a product pH of 3.5 or higher.
Onset
Smoothness and a hydrated feel are more noticeable with several weeks of continued use
Cautions
According to the FDA, 4 weeks of use increased sensitivity to UV-induced redness by 18%. Use sunscreen while using it and for one week after stopping.
Evidence & references
Japanese Standards for Cosmetics (no upper limit listed for glycolic or lactic acid) / FDA Alpha Hydroxy Acids https://www.fda.gov/cosmetics/cosmetic-ingredients/alpha-hydroxy-acids (checked 2026-10-20)
Journal

Related Journal

3
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This page is reference information and does not guarantee efficacy. Figures vary by test conditions (in vitro / manufacturer / concentration). It does not indicate pharmaceutical efficacy.
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